Originally Posted by Kawaii Ryûkishi
Materia is without a doubt the most powerful system due to the incredible combinations of actions and attacks that can be achieved by linking the right materia and how open to creativity devising such tactics is.
Fire + Quadra Magic
Fire + MP Turbo
Fire + MP Absorb
Fire + HP Absorb
Fire + Added Cut
Fire + Steal As Well
Fire + Magic Counter
W-Magic
Magic Plus
With this combination, Fire (or any offensive spell, really) will be cast upon random targets four times, pausing between blasts while the spellcaster rushes in and steals their possessions. Every blast returns some HP and MP to the caster, and if any enemies survive the magic, they'll be nailed by four regular attacks thanks to Added Cut. Then W-Magic makes it happen all over again. MP Turbo and Magic Plus enhance the strength of the magic, which is probably superfluous, but Magic Counter sets off the combo when the character is struck, meaning that nobody even has to act for it to work.